Master perforator



April 5, 1932. c. w. CRUMRINE MASTER PERFORATOR Filed Jan. 29. 1950 INVENTOR WC'mzmr me F's is ATTORNEY Patented Apr. 5, 1932 UNITED STATES TYPEWRITERS, INC., OF ROCHESTER, NEW YORK, A CORPORATION'OF NEW YORK MASTER PERronAToR,

Application filed January 29, 1930. Serial 110,424,238, i

This invention relates to punching machines, and more particularlyto that class of punching machines used for perforating paper or other sheets, for master control sheets to be used in mechanical and electrically operated machines, such as typewriters.

- The principal object of this invention is to produce a machine of this kind which is simple in construction, inexpensive to make, and in which means is provided for catching the disks ejected by the punches and conveying them away from the operating point of the machine, so that they cannot get into the mechanism.

Another object of the invention is to produce a machine of this kind having a hollow die into which the cut disks are deposited, and means for conveying the disks to one end of the die where they are discharged.

A still further object of the invention'is to provide a machine of this kind with a cylindrical die having a revoluble spiral brush for moving the disks or slugs cut fro-m the sheet along the die to prevent them from getting into the mechanism of the machine.

Another object of the invention is to provide a machine of this kind with a feed roll revoluble on an oscillatory shaft, and a pawl and ratchet mechanism on said shaft for driving the spiral brush in one direction.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims following the specification.

In the drawings:

Figure 1 is an end elevation of a portion of a punching machine illustrating one embodiment of the invention;

Figure 2 is a transverse section through the die and illustrating the relation of the punch thereto, and

Figure 3. is a front elevation of the left hand end of the machine, partly in section on the line 33 of Figure 1. c

Referring particularly to the drawings, in which similar reference numerals refer to the same parts in all figures,'1 indicates the frame 1 jzontal line for cooperation with the PATENT of F YCE I C fiESTER W. CRUMRINE, OF ROCHESTER, NEW YORK, ASSIGENOHQ TO ELECTROMATIC.

in which the shaft '2 is mounted for oscillating movement. A feed r0113 is mounted on the shaft to rotate thereon and is provided with devices for rotating it one .unit distance each time one of the punch keys is depressed, as is usual in the art. Eachfend, of the feed roll is provided with one or more circum ferential rows of projections & which are adapted to engage similarly spaced openings in the margins of a Work .sheet..5.' 'By this arrangement, rotation of the feed roll moves the work sheet an equal distance.

Mounted in the frame and fixed therein ad jacent the feed rolle'riis a die 6, with which there cooperates means forfconveyingthe" ejected disks away from the punching point,

and to accomplish this, theidie is preferably cylindrical aslshown, although it may be otherwise constructed while affording a 'conveyor of some other form. The die, at its front side, is providedwitha plurality of openings 7 arrangedin a substantially horipunches Spresently to be described. 1 The Work sheet is heldbetween feeding operations against the die over. the openings 7.

It is guided to the diepreferably by means of an apron 9 secured on the'frame or 'ablock 10 extending. between and secured to the ends of the frame; The apron Qextends forwardly beneath the die and is curved upwardly'at the front of the'die to direct the sheetover the openings 7 in the fron'twall thereof. As shown, the apron9 is provided with offset cars 11 adapted; to engageheaded screws or vpins 12 projecting rearwardly from the block 10 The block, extends transverselyjof' the machine and isprovided with 'a-plurality of longitudinally arranged :openings :15 each alinedwithione of the openings? in ,the die 6 and forming aflguidewayfor a punch 8 slidable therein. The punch 8 is actuated by 1 a leverorarm lfi pivoted in the frame at 17 I and connected at its" upper end iwiththe rear by suitable l neansfnot shown.

The Qarin 16fmay be operated manually end of the punch, the arm 16 being'operated from a keyboard, or mechanicalyby means of power driven devices under the. control of a wardly in its guideway into cut keyboard. It will be understood that when operated, the arm 16 slides the punch 8 rearengagement with its corresponding openmg in the die 6 and the work sheet thereon. Resilient means, such as a spring, may be employed for returning the lever 16 and the punch connected therewith to normal position, in whicha stop 20 on an arm projecting rearwardly and upwardly from the arm 16 engages theblock. 10 and limits the action of the spring. The

forward movement of the punch is limited by the engagement of the arm 16 with the block 10, which engagement takesrplace as soon as the punch has cut entirely through the sheet, By this action, the disk or slug from the sheet is ejected forwardly through the wall of the die in which it is deposited. V Meansareprovided for conveying the disks deposited in the die longitudinally thereof 7 and discharging them through anopening provided for the purpose at one endof thedie. Said means may comprise a screw or spiral device 24; arranged axially in the die, and means for rotating the same, The spiral device or screw is preferably constructed of resilient material and maybe made in the form of a spiral brush as shown, which is connected to a stub shaft 25 revolubly mounted in ablock 26 at one end of the die;

one direction, a shaft in said die, a conveyor thereon, and means operatively connecting said second shaft with said ratchet wheel.

2. In a sheet punching machine, the com} binationof a hollow die,a feedroll for moving a work sheet fthereover, an oscillatory 2' shaft on which said "feed roll is mounted, a ratchet wheel revoluble on said shaft, a pawl on said shaft cooperating with said ratchet wheel for turning the same in one direction,

a shaft in said die, a conveyor thereon, and fiexlble means'operatively connect1ng' 'sa1d second shaft with said ratchet wheel.

In witness whereof, I have hereunto signed my name.

CHESTER W, CRUMRINE. 2

. Meanslare provided forturning'the shaft 25a-nd the spiral brush in one direction for conveying the disks along the die and discharging them therefrom. To this end, a pulley'27 is secured to the outer end of the shaftand connected by a flexible belt 29' to apulley28 revolubly mounted'onthe shaft 2. Secured to or formed integral withthe pulley 28 is a toothed wheel 30 in the form ofa'ratchet,'and cooperating with this wheel is a'p'awl 31. Thepawl 31 is carried on'an a'rmv32, to which it] is pivoted, and als'pring 1 V 38 is secured atone end to the arnifandjhas its other liend' connected with the pawl for 2 resiliently maintaining it. in operative en Jagement with the teeth of'the ratchet wheel. V T i he arm 33' is secured 'to the shaft 2am turns therewith. When theshaft is turned in onedirecti'on, the; pawl rides idly over the teeth of ther'atche't wheel, but'when'iturned in the other direction, it engages" the'teeth, and the ratchet wheel and the pulley 28securedth'ereto turn as a unit with the shaft;

R otatio'ribf the pulley 28 is transmitted to the pulley '27 through the belt 29, thus effecting rotation of the spiral brush to convey I the disks along the die. If desired, a suitable V receptacleforjthe disksmaybe arranged ad- 7 jacentthe opening '23 into whichfthey could fall by ravity,

'Although his invention hasjb eri'desrited with reference to a single embodimentfthere of, it will'be understood that this 'applica- 'tion is'intended to cover such 7 changes or g 

